An event may be logged after you restart Windows Server 2008: "Event ID: 5 Message: The Virtual Storage Filter Driver is disabled through the registry. It is inactive for all disk drives"

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Article ID: 951007 - View products that this article applies to.
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SYMPTOMS

After you restart Windows Server 2008, the following event may be logged in the System log:

Log Name: System
Source: storflt
Event ID: 5
Level: Warning
Task Category: None
Message: The Virtual Storage Filter Driver is disabled through the registry. It is inactive for all disk drives.

CAUSE

This event is logged when one of the following scenarios is true:
  • The virtual storage filter driver cannot attach to the virtual storage device. The virtual storage filter driver is included in Windows Server 2008. This driver optimizes the performance of disk I/O if Windows Server 2008 is running on a Microsoft Hyper-V Server.
  • Windows Server 2008 is installed as the host operating system or as the guest operating system before the most recent version of Hyper-V Server is installed.

RESOLUTION

If Windows Server 2008 is not running on a Hyper-V Server, this issue will not affect the performance of the operating system. Therefore, you can safely ignore this event.

Properties

Article ID: 951007 - Last Review: May 2, 2011 - Revision: 2.0
APPLIES TO
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 Enterprise without Hyper-V
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Standard
Keywords: 
kbhyperv kbexpertiseinter kbtshoot kbprb KB951007

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